Lamp-burner



(No Model.)

N. TR'OWBRIDGE.

LAMP BURNER.

Patented Oct. 21

N. PEYERS. Pnam-Lnhogmpher. washmxton. D. C.

Unire STATES Armar Fries.

NEVION TROVBRIDGE, OF TOPEKA, KANSAS.

LAM P-BURNER.

SEJECIFICATION forming part of Letters Patent No. 306,788, dated October 2l, 1884.

' Application filed December 2l, i853. (No model.)

To all whom, it litany concer/L.-

Be it known that I, NEWTON TRowBniDcn, a citizen of the United States, residing at the city of Topeka, in the county ot' Shawnee and State of Kansas, haveinvented new and useful Improvements in Lampurners, of which vthe vfollowing is a specification.

My invention relates more particularly to that class of lamps for petroleum and similar oils which have a burner provided with a cone containing an elongated opening or slit through which the flame ascends.

The object of the invention is to provide a transparent cone which will permit abetter distribution of the light than those constructed of metal, and which will at the same time be l'reeY from danger ot' breakage on account of the high temperature and sudden changes of temperature to which it is subjected.

To this endit consists in a cone const-ructed of glass, in two or vmore sections or segments,

and in means whereby the segments are locked in position with respect to each other and to the body of the burner. and by which they are held in close contact with a yielding pressure, so that they may readily expand and contract without being disabled or broken. l

Referring to the accompanying drawings, Figure l. represents a vertical central crosssection of a lamp-burner having my improvements embodied therein, the section being taken in theline xx of Fig. 2. Fig. 2 is a top plan view of the burner. Fig. 3 is a vertical cross-section on the line y y.

Referring to the drawings, A represents the body or base portion of the burner, designed to receive and sustain the chimney, and provided, as usual, with an upright flattened wicktube, a.

The foregoing parts and the other parts usual in burners of this class may be constructed in the ordinary form and manner, except as to the details hereinafter specified.

B represents my improved cone mounted on the base portion over and around the wicktube, and provided, as usual, with an elon gated opening or slit, b, in the top for the passage of the flame. The cone may be made in all respects of the same form as the ordinary sheet-metal cones, but is composed of glass or equivalent transparent material, and is divided vertically into two or more parts. It is preferred to make the division at'the ends ot' the slit or opening, as shown in the drawings;

but it maybe otherwise divided in special cases, if preferred.

In order to hold the two parts in the proper relation to each other, I provide one or both with lips d, each adapted to 4overlap the adjacent edge of the otherI part.

In order to maintain the cone firmly in position on the burner, and particularly to prevent its horizontal rotation, which would bring the edges ot' the flame in contact with the glass and result in its destruction, I provide the sections with depending studs or shoulders c, adapted to enter or interlock with correspondingdepressions in the top of the body.

It will be observed that by means ofthe two series of lugs the cone is prevented from moving its position in either direction, and that the edges of the two parts are held directly against each other, so that the passage of air between them is prevented.

In order to conne the parts of the cone se-V curely in position, but permit them to yield as they expand and contract, I make use of elastic and yielding and elastic devices to attach the same to the body of the burner. The preferred device for this purpose is a spiral spring, arranged in position to encircle and bear upon the lower edge of the cone, and united to the burner at any desired number of points in its length. Usually four points of connection are suiiicient. The spring thus applied will yield, in order to permit the insertion of the cone, and will act thereon, when in position, with a yielding pressure.

Having, thus described my invention, what I claim isl. The combination, substantially as hereinbefore described and shown, of the lampburner having a flat wick-tube, and a divided glass cone provided with shoulders to engage the burner and prevent the rotation of the glass thereon.

2. The divided glass cone provided with interlocking studs on their contiguous edges, and also with studs or shoulders to engage t-he body or support.

3. In combination with a divided glass conc, a support therefor, and elastic connecting devices, substantially as described, acting to confine the parts in close contact and permitting them to expand or contract.

Titnessesz NEWTON TROWBRIDGE.

NV. H. Poort', SEYMOUR DA'vis.

IOO 

